actionlib axclient always disconnected from server

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Hi all,

I am trying to run an action using my computer as a client and a robot as a server. I am using the actionlib axclient for that. In my computer I can see the topic I want to use

rostopic info /navigation_wp/goal
Type: navigation_wp/NavigateActionGoal

Publishers: None

Subscribers: 
 * /navigation_wp (http://<robot_host>:39727/)

However when I use the axclient it always says that I am disconnected from the client and I can not send any goal

rosrun actionlib axclient.py /navigation_wp/goal

See picture attached C:\fakepath\axclient.png

Also, I have checked that my bashrc is correctly set

export ROS_MASTER_URI="http://192.168.0.42:11311"

which is the IP of the robot

Any clue?

Thanks!